[PATCH] D61300: [SCCP] Fix crash when trying to constant-fold terminators multiple times.

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: davide, efriedma, mssimpso.
Herald added a subscriber: hiraditya.
Herald added a project: LLVM.

If we fold a branch/switch to an unconditional branch to another dead block we
replace the branch with unreachable, to avoid attempting to fold the
unconditional branch.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D61300

Files:
  llvm/lib/Transforms/Scalar/SCCP.cpp
  llvm/test/Transforms/SCCP/switch-constantfold-crash.ll

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